gantt-task-react/src/helpers/other-helper.ts

import { BarTask } from "../types/bar-task";
import { Task } from "../types/public-types";

export function isKeyboardEvent(
  event: React.MouseEvent | React.KeyboardEvent | React.FocusEvent
): event is React.KeyboardEvent {
  return (event as React.KeyboardEvent).key !== undefined;
}

export function isMouseEvent(
  event: React.MouseEvent | React.KeyboardEvent | React.FocusEvent
): event is React.MouseEvent {
  return (event as React.MouseEvent).clientX !== undefined;
}

export function isBarTask(task: Task | BarTask): task is BarTask {
  return (task as BarTask).x1 !== undefined;
}

export function removeHiddenTasks(tasks: Task[]) {
  const groupedTasks = tasks.filter(t => t.hideChildren);
  if (groupedTasks.length > 0) {
    for (let i = 0; groupedTasks.length > i; i++) {
      const groupedTask = groupedTasks[i];
      const children = getChildren(tasks, groupedTask);
      tasks = tasks.filter(t => children.indexOf(t) === -1);
    }
  }
  return tasks;
}

function getChildren(taskList: Task[], task: Task) {
  let tasks: Task[] = [];
  if (task.type !== "project") {
    tasks = taskList.filter(
      t => t.dependencies && t.dependencies.indexOf(task.id) !== -1
    );
  } else {
    tasks = taskList.filter(t => t.project && t.project === task.id);
  }
  const taskChildren = tasks.reduce(
    (children: Task[], t) =>
      children.concat(children, getChildren(taskList, t)),
    []
  );
  tasks = tasks.concat(tasks, taskChildren);
  return tasks;
}